Top-rated mold testing and remediation specialists.

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There are 16 highly-rated local mold testing and remediation specialists.

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Impresair Environmental Corp

439 Ferry St
4.80(
157
)
Approved Pro

Impresair Environmental Corp

439 Ferry St
4.80(
157
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
28 local quotes requested

4 employees. No subs. Cost is determined by the job. No travel charges. No service fees. LICENSE # AC000774. No extra charge for after hours service. Additional contact - Maria Najarro. May contact through email [email protected], [email protected] or by calling at (617) 625-7106, (617) 594-8145 (617) 682 5439 FAX (781) 397-0102.

"Quick, complete, and clean. The crew were in and out within a few hours, cleaned up beautifully, and had the inspector in to certify the removal promptly when the work was complete. This was a tough project (old HVAC ducts in a crawlspace), done well."

William B on April 2021

4 employees. No subs. Cost is determined by the job. No travel charges. No service fees. LICENSE # AC000774. No extra charge for after hours service. Additional contact - Maria Najarro. May contact through email [email protected], [email protected] or by calling at (617) 625-7106, (617) 594-8145 (617) 682 5439 FAX (781) 397-0102.

"Quick, complete, and clean. The crew were in and out within a few hours, cleaned up beautifully, and had the inspector in to certify the removal promptly when the work was complete. This was a tough project (old HVAC ducts in a crawlspace), done well."

William B on April 2021


Avatar for ASAP Environmental Inc

ASAP Environmental Inc

1 Arcadia St
4.84(
83
)
Approved Pro

ASAP Environmental Inc

1 Arcadia St
4.84(
83
)
Approved Pro
Customers say: Super punctual
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
76 local quotes requested

Lead paint can be found in almost 75% of all housing built before 1978 and a dangerous mold infestation could exist in any home no matter how old the home is. A professional inspection from ASAP Environmental is the best way to protect yourself before you buy.

"We had a pipe break in our kitchen ceiling and an issue with condo owners that felt “the mold was everywhere”. Christopher was amazingly knowledgeable and explained all of the issues without being an alarmist putting us all at ease and did a thorough inspection. As an architect for 40 years he was the best mold expert that I have met and would highly recommend them."

Paul D on February 2023

Lead paint can be found in almost 75% of all housing built before 1978 and a dangerous mold infestation could exist in any home no matter how old the home is. A professional inspection from ASAP Environmental is the best way to protect yourself before you buy.

"We had a pipe break in our kitchen ceiling and an issue with condo owners that felt “the mold was everywhere”. Christopher was amazingly knowledgeable and explained all of the issues without being an alarmist putting us all at ease and did a thorough inspection. As an architect for 40 years he was the best mold expert that I have met and would highly recommend them."

Paul D on February 2023


Avatar for Femme Works Solutions LLC

Femme Works Solutions LLC

213 Sutton St
5.00(
6
)
Approved Pro

Femme Works Solutions LLC

213 Sutton St
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
102 local quotes requested

FEMME WORKS SOLUTIONS LLC is a Massachusetts licensed Asbestos Removal Company that also provides demolition services to Residential and Commercial properties. We have nearly 15 years of experience and are able to provide our customers with clear information on the safe removal and disposal of Asbestos Containing Materials (ACM). We offer Asbestos Testing Services in preparation for demolition permits or any type of property renovations per state requirements. We offer a 100% guarantee of top-notch service from start to finish.

"Excellent. The team completed the work in just a few hours. The work area was extremely clean. Very affordable for the work. Highly recommend."

Richard R on May 2024

FEMME WORKS SOLUTIONS LLC is a Massachusetts licensed Asbestos Removal Company that also provides demolition services to Residential and Commercial properties. We have nearly 15 years of experience and are able to provide our customers with clear information on the safe removal and disposal of Asbestos Containing Materials (ACM). We offer Asbestos Testing Services in preparation for demolition permits or any type of property renovations per state requirements. We offer a 100% guarantee of top-notch service from start to finish.

"Excellent. The team completed the work in just a few hours. The work area was extremely clean. Very affordable for the work. Highly recommend."

Richard R on May 2024


Avatar for Affordable Mold Removal

Affordable Mold Removal

1248 Washington St
4.88(
99
)
Approved Pro

Affordable Mold Removal

1248 Washington St
4.88(
99
)
Approved Pro
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
72 local quotes requested

Certified Mold Remediation for over ten years. We can handle the big jobs down to the small jobs. We offer free inspections and estimates. Locally owned and owner is on all jobs to answer any questions you may have. The service you get with us cannot be matched. Additional contact - Dina Oliver

"Did mold remediation in 2020 before house was purchased. Mold found in attic. Resolved it with a 4 year warranty expiring 3-23-24. In January 2024, found mold in same spot. They inspected and sent an estimate to remove. Asked about the warranty still in place. Never responded. Did a good job of remediation work. Doesn’t support their warranty."

Deborah H on February 2024

Certified Mold Remediation for over ten years. We can handle the big jobs down to the small jobs. We offer free inspections and estimates. Locally owned and owner is on all jobs to answer any questions you may have. The service you get with us cannot be matched. Additional contact - Dina Oliver

"Did mold remediation in 2020 before house was purchased. Mold found in attic. Resolved it with a 4 year warranty expiring 3-23-24. In January 2024, found mold in same spot. They inspected and sent an estimate to remove. Asked about the warranty still in place. Never responded. Did a good job of remediation work. Doesn’t support their warranty."

Deborah H on February 2024


Avatar for My Pure Environment- New England

My Pure Environment- New England

43 Nesmith ST
5.00(
32
)
Approved Pro

My Pure Environment- New England

43 Nesmith ST
5.00(
32
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
125 local quotes requested

My Pure Environment New England provides mold removal from homes and businesses throughout Massachusetts. We use a patented dry fog technology that allows us to wipe out the toxic mold, like black mold, from virtually any building. Our revolutionary demolition-free mold remediation method means we can break down microbes on a molecular level, and get rid of the problem without removing walls or ceilings. And because our mold treatment fog is dry, nothing in your home or office is at risk for water damage. Best of all it's all-natural using EPA-registered products and is the only mold remediation process with a one-year guarantee

"Ray was professional and did a good job getting me test results and then even helping understand those as well! A+"

Lynda S on May 2025

My Pure Environment New England provides mold removal from homes and businesses throughout Massachusetts. We use a patented dry fog technology that allows us to wipe out the toxic mold, like black mold, from virtually any building. Our revolutionary demolition-free mold remediation method means we can break down microbes on a molecular level, and get rid of the problem without removing walls or ceilings. And because our mold treatment fog is dry, nothing in your home or office is at risk for water damage. Best of all it's all-natural using EPA-registered products and is the only mold remediation process with a one-year guarantee

"Ray was professional and did a good job getting me test results and then even helping understand those as well! A+"

Lynda S on May 2025


Radon Systems LLC

170 Burbank Rd
4.97(
226
)
Approved Pro

Radon Systems LLC

170 Burbank Rd
4.97(
226
)
Approved Pro
Customers say: Super punctual
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
67 local quotes requested

Guaranteed Results! Radon Systems LLC has installed over 20,000 successful Radon mitigation systems since 1985. Radon Systems LLC is one of the few full service Radon mitigation companies that remediate both Radon in air and Radon in water. We are state certified and fully insured. Radon Systems LLC is recognized by the National Environmental Health Association (NEHA) and the American Association of Radon Scientists and Technologists (AARST).

"Derick did a great clean job. I live in a ranch with an unfinished basement. Install took around 1 hour. Derick was punctual, professional and informative. System is doing its job!"

James P on July 2024

Guaranteed Results! Radon Systems LLC has installed over 20,000 successful Radon mitigation systems since 1985. Radon Systems LLC is one of the few full service Radon mitigation companies that remediate both Radon in air and Radon in water. We are state certified and fully insured. Radon Systems LLC is recognized by the National Environmental Health Association (NEHA) and the American Association of Radon Scientists and Technologists (AARST).

"Derick did a great clean job. I live in a ranch with an unfinished basement. Install took around 1 hour. Derick was punctual, professional and informative. System is doing its job!"

James P on July 2024


Avatar for All Clean Environmental Services, Inc.

All Clean Environmental Services, Inc.

1052 River St
4.54(
39
)
Approved Pro

All Clean Environmental Services, Inc.

1052 River St
4.54(
39
)
Approved Pro
Customers say: Quality work
42 local quotes requested
4 years of experience

All Clean Environmental Services, Inc. is a full-service hazardous materials remediation firm specializing in mold and asbestos removal using the highest quality safety standards. We have 25 years of experience as asbestos contractors who also perform mold removal and controlled interior demolition. Our employees are fully licensed by the Massachusetts Department of Labor Standards and trained in the most current federal EPA and Massachusetts DEP standards. Clean Air Environmental, Inc is based in Boston Massachusetts and serves customers across the state including Cape Cod, and the islands. We offer service by appointment as well as 24/7 emergency services, so call us at 617-970-2572 or email [email protected] to set up a free estimate or consultation.

"For those of you looking for an honest, kind, caring person in the world of “hazardous vapors” look no further than this company. Kevin at All Clean Environmental Services took my panicked call on a Saturday and listened in detail about health concerns regarding “moth ball odors” in my family’s rental property. With that he volunteered to come and “check out” the offensive odors. Kevin was very discreet as well as thorough in his handling of visit to “our” home. Having never dealt with this problem he was quickly in contact with his suppliers of treatment options."

MARIA W on August 2023

All Clean Environmental Services, Inc. is a full-service hazardous materials remediation firm specializing in mold and asbestos removal using the highest quality safety standards. We have 25 years of experience as asbestos contractors who also perform mold removal and controlled interior demolition. Our employees are fully licensed by the Massachusetts Department of Labor Standards and trained in the most current federal EPA and Massachusetts DEP standards. Clean Air Environmental, Inc is based in Boston Massachusetts and serves customers across the state including Cape Cod, and the islands. We offer service by appointment as well as 24/7 emergency services, so call us at 617-970-2572 or email [email protected] to set up a free estimate or consultation.

"For those of you looking for an honest, kind, caring person in the world of “hazardous vapors” look no further than this company. Kevin at All Clean Environmental Services took my panicked call on a Saturday and listened in detail about health concerns regarding “moth ball odors” in my family’s rental property. With that he volunteered to come and “check out” the offensive odors. Kevin was very discreet as well as thorough in his handling of visit to “our” home. Having never dealt with this problem he was quickly in contact with his suppliers of treatment options."

MARIA W on August 2023


"The 1964 bulkhead I had out back was replaced a year ago, but the wood and insulation underneath (the ceiling of the walkway underground to my basement under the back living room) took in water damage and the area was very musty for years. Tom Morneault of Morneault Environmental was the only guy I could find that would not only treat the wood to remove anything growing on it/get rid of the smell, but his team also removed old wood and insulation and re-insulated for me as part of the deal, which was still hundreds of dollars cheaper than the other companies I talked to, which would only remove the old wood and insulation, they don't put anything back in. Tom's team was here by 8:30 this morning and by 2pm they were done and it looks fantastic and smells crisp and clean. They didn't even stop for breaks or have to make any trips to get supplies, they had them all in the van, including the insulation boards. Very highly recommended if anyone is in the same situation."

Stephen T on June 2024

Veteran owned and operated with over a decade of experience in the demolition and environmental services.

"The 1964 bulkhead I had out back was replaced a year ago, but the wood and insulation underneath (the ceiling of the walkway underground to my basement under the back living room) took in water damage and the area was very musty for years. Tom Morneault of Morneault Environmental was the only guy I could find that would not only treat the wood to remove anything growing on it/get rid of the smell, but his team also removed old wood and insulation and re-insulated for me as part of the deal, which was still hundreds of dollars cheaper than the other companies I talked to, which would only remove the old wood and insulation, they don't put anything back in. Tom's team was here by 8:30 this morning and by 2pm they were done and it looks fantastic and smells crisp and clean. They didn't even stop for breaks or have to make any trips to get supplies, they had them all in the van, including the insulation boards. Very highly recommended if anyone is in the same situation."

Stephen T on June 2024


The Olympus Construction Corp.

PO Box 891
5.00(
1
)
Approved Pro

The Olympus Construction Corp.

PO Box 891
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

The Olympus Construction Corp, is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities, and to provide our employees with a great place to work. We are a leader in providing our customers with the highest quality products and craftsmanship, in an honest, efficient and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.

"Very knowledgeable and they know how to remedy the situation, highly recommend them."

Mike A on April 2021

The Olympus Construction Corp, is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities, and to provide our employees with a great place to work. We are a leader in providing our customers with the highest quality products and craftsmanship, in an honest, efficient and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.

"Very knowledgeable and they know how to remedy the situation, highly recommend them."

Mike A on April 2021


Avatar for Cleanway Services

Cleanway Services

50 Saint Marys Street
4.38(
8
)
Approved Pro

Cleanway Services

50 Saint Marys Street
4.38(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
28 years of experience

Cleanway Services provides emergency restoration services to help you when your home or business has mold, fire and smoke damage, water damage, or a flood. We work with insurance providers and can be on site in Vermont, New Hampshire and Massachusetts within hours. Our 24/7 technicians are here to help! Not only are we there from the beginning, we can also take care of putting your home back together. With our licensed and fully trained construction rebuild team, we can handle all your needs. In addition we offer green carpet cleaning services including upholstery cleaning to keep your home clean and free of allergens and odors. If you drop off your rug at our St Johnsbury location we can clean that too!

"There were a few pilly things on the carpet, no big deal quick vac took care of them. All in all area carpet looked a lot better then before ."

Rick Q on December 2014

Cleanway Services provides emergency restoration services to help you when your home or business has mold, fire and smoke damage, water damage, or a flood. We work with insurance providers and can be on site in Vermont, New Hampshire and Massachusetts within hours. Our 24/7 technicians are here to help! Not only are we there from the beginning, we can also take care of putting your home back together. With our licensed and fully trained construction rebuild team, we can handle all your needs. In addition we offer green carpet cleaning services including upholstery cleaning to keep your home clean and free of allergens and odors. If you drop off your rug at our St Johnsbury location we can clean that too!

"There were a few pilly things on the carpet, no big deal quick vac took care of them. All in all area carpet looked a lot better then before ."

Rick Q on December 2014

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Mold Testing and Remediation questions, answered by experts

Mold remediation is required if the mold growth covers more than 10 square feet of an area or the mold spore concentration is above 500 spores per cubic meter of air. You should also seriously consider remediation if there is a lot of water damage along with mold growth or if you suspect your HVAC system has been contaminated with mold. Remediation is also crucial if the mold damage has been caused by sewage or other contaminated water.

No. When dry, mold enters a dormant state. While “sleeping,” the mold won’t multiply, but when it encounters moisture again, it springs back to life, releasing spores. That's why it's crucial to not only control humidity but also actively eliminate mold to prevent its resurgence and further growth inside your home.

Nearly all homes have at least some airborne mold spores. If you want to determine the concentration of spores in the air, you have a few options. The most effective option is to hire a professional tester who can take air samples of the home. The tester would send the samples to a laboratory to determine the concentration of mold spores. 

One of the first signs of mold in an air conditioner is a musty smell. You're likely to notice the smell when the unit runs, from the air coming out of the vents or the unit itself. You may also be able to see mold growing on the unit, such as near the condenser coils or by the fan. In some cases, there may be visible mold by the vents.

If you're wondering about black stains on brick at your home, the answer is that you're not looking at efflorescence. While efflorescence can be darker when certain types of salt are involved, black staining is caused by carbon staining, pollution from vehicles, and chimney soot. Black stains can also be caused by organic materials like lichen, algae, or mold.

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The North Andover, MA homeowners’ guide to mold testing and remediation services

From average costs to expert advice, get all the answers you need to get your job done.